Thread: transmission question

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  1. #1 transmission question 
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    Can a transmission from a 98 grand prix se 4T65E, be installed into a 98 grand prix GTP supercharged. I believe the GTP has a 4T65E HD in it. I am having trouble locating a 4T65E HD.

    Thanks!
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  2. #2 Re: transmission question 
    GTX Level Member Rather B Blown's Avatar
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    yes it can but you will have to get your pcm tuned for the different gear ratio. Or you can put your HD differential in the non hd tranny if the hd dif is still good
    Quote Originally Posted by Reptile
    It sounds like you accidentally stuffed a midget in the downpipe, and he's hammering out an SOS to get out.
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